CN220082264U - High-pressure sealing structure suitable for wide temperature range - Google Patents
High-pressure sealing structure suitable for wide temperature range Download PDFInfo
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- CN220082264U CN220082264U CN202321389306.1U CN202321389306U CN220082264U CN 220082264 U CN220082264 U CN 220082264U CN 202321389306 U CN202321389306 U CN 202321389306U CN 220082264 U CN220082264 U CN 220082264U
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- 238000007789 sealing Methods 0.000 title claims abstract description 123
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 21
- 239000012530 fluid Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 10
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 239000003566 sealing material Substances 0.000 description 17
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Abstract
The utility model relates to a high-pressure sealing structure suitable for a wide temperature range, which comprises a columnar center piece and a cylindrical outer part, wherein the columnar center piece is arranged in the cylindrical outer part; the cylindrical center piece and the cylindrical outer part are sealed by sleeving a high-temperature sealing ring and a low-temperature sealing ring on the cylindrical center piece; the high-temperature sealing ring and the low-temperature sealing ring are contacted with each other; under the low-temperature environment, the low-temperature sealing ring has elasticity to seal, and the high-temperature sealing ring loses elasticity to play a supporting role; under the high-temperature environment, the high-temperature sealing ring is elastic to seal, and the low-temperature sealing ring is soft to play a role in filling. The beneficial effects achieved by the utility model are as follows: the cost is low, and the sealing effect is good; solves the problem of sealing failure of the H2 pressure reducer under the ultra-wide temperature range (-40 ℃ to 120 ℃) and high sealing pressure (70 Mpa).
Description
Technical Field
The utility model relates to the technical field of new energy automobile parts, in particular to a high-pressure sealing structure suitable for a wide temperature range.
Background
In an H2 fuel cell hydrogen supply system or a hydrogen-burning engine, the operating temperature of the H2 pressure reducer ranges from-40 ℃ to 120 ℃. The vehicle can run at low temperature in winter and also at high temperature in summer, and if the sealing pressure of the H2 pressure reducer is 70Mpa high-pressure sealing, the sealing between the plunger pressure reducer and the electromagnetic cylindrical outer part of the pressure reducer is easy to fail.
Currently, three main materials are selected for the sealing ring of the tubular outer part of the electromagnetic valve of the H2 pressure reducer in the market: 1. the high-temperature resistant sealing material is adopted, the hardness is high, the sealing can be carried out at high temperature, but the sealing effect at low temperature is poor, and the high-temperature resistant sealing material is suitable for an H2 pressure reducer working in a high-temperature environment for a long time; 2. the sealing material with low temperature resistance is adopted, the hardness is low, the sealing can be carried out at low temperature, but the sealing effect is poor at high temperature, and the leakage is easy to occur; 3. the special customized sealing material can simultaneously meet the sealing requirement under the high-temperature and low-temperature environment, but the cost of the sealing material is higher.
The first two are low in cost, the first is suitable for working in summer and the second is suitable for working in winter, but sealing failure can be caused when changing seasons. The third one can be used in any season, but the cost is too high.
Based on the above, the company designs a high-pressure sealing structure suitable for a wide temperature range, and the sealing effect of each season can be realized by the structural design of the high-pressure sealing structure with low cost.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art, provides a high-pressure sealing structure suitable for a wide temperature range, solves the problem that the low cost and the sealing effect cannot be achieved, and also solves the problem that the H2 pressure reducer fails in sealing under the conditions of an ultra-wide temperature range (-40-120 ℃) and high sealing pressure (70 Mpa).
Embodiments of the present disclosure provide at least one high pressure seal suitable for a wide temperature range.
In the embodiment of the disclosure, the high-pressure sealing structure suitable for a wide temperature range comprises a cylindrical center piece and a cylindrical outer part, wherein the cylindrical center piece is arranged in the cylindrical outer part; the cylindrical center piece and the cylindrical outer part are sealed by sleeving a high-temperature sealing ring and a low-temperature sealing ring on the cylindrical center piece; the high-temperature sealing ring and the low-temperature sealing ring are contacted with each other;
under the low-temperature environment, the low-temperature sealing ring has elasticity to seal, and the high-temperature sealing ring loses elasticity to play a supporting role; under the high-temperature environment, the high-temperature sealing ring is elastic to seal, and the low-temperature sealing ring is soft to play a role in filling.
For example, according to the embodiment of the disclosure, the columnar center piece is provided with an annular groove, and the high-temperature sealing ring and the low-temperature sealing ring are sleeved in the annular groove. The structure is more suitable for the sealing mode of the scheme.
For example, according to embodiments of the present disclosure: when the cylindrical central piece and the cylindrical outer part are sealed in a low-temperature environment, the lowest air temperature is not less than-40 ℃, and the highest fluid pressure is not more than 70MPa; when the cylindrical center piece and the cylindrical outer part are sealed in a high-temperature environment, the highest air temperature is not more than 120 ℃, and the highest fluid pressure is not more than 70MPa.
For example, when used in an H2 reducer solenoid valve, according to embodiments of the present disclosure: the high-temperature sealing ring and the low-temperature sealing ring are sleeved on the columnar center piece, and the columnar center piece is arranged in the cylindrical outer part.
For example, according to an embodiment of the present disclosure, the H2 pressure relief solenoid valve includes a cylindrical outer member, a cylindrical center member, a return spring assembly, a moving spool assembly; the upper end of the cylindrical outer part is provided with a cover body, and a columnar center piece, a return spring assembly and a movable valve core assembly are sequentially arranged in the cylindrical outer part from top to bottom; the movable valve core assembly can slide in the cylindrical outer part, and the flexible layer at the lower part of the movable valve core assembly seals the air outlet passage opening under the pressure of the return spring assembly; when the movable valve core assembly slides upwards, the air inlet channel hole is communicated with the air outlet channel hole; when the movable valve core assembly slides downwards, the air outlet channel hole is blocked; the movable valve core assembly and the columnar center piece are magnetically conductive and are attracted to each other when the enameled wire is electrified, and the movable valve core assembly slides upwards; the cylindrical outer part and the enameled wire are both positioned in the electromagnetic valve shell, and the electromagnetic valve shell is provided with an electrifying jack.
For example, according to embodiments of the present disclosure, when used in a plunger-type pressure reducer, both the high temperature seal ring and the low temperature seal ring are sleeved on the plunger, which is located in the plunger cavity of the pressure reducer body.
The utility model has the following advantages: through a two-stage sealing structure, a sealing ring made of a low-temperature-resistant sealing material with lower hardness is adopted by a pressure end, and a sealing ring made of a high-temperature-resistant sealing material with higher hardness is closely arranged behind the sealing ring made of the low-hardness sealing material; under the condition of low cost, the sealing ring of the high-temperature sealing material and the sealing ring of the low-temperature sealing material are combined in two stages to form a two-stage combined sealing structure, so that excellent sealing effect can be realized in high-temperature and low-temperature environments; solves the problem of sealing failure of the H2 pressure reducer under the ultra-wide temperature range (-40 ℃ to 120 ℃) and high sealing pressure (70 Mpa).
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model when used in an H2 solenoid valve;
FIG. 2 is a schematic view of a partial assembly of the present utility model;
FIG. 3 is a schematic view of the seal of the present utility model at low temperature;
FIG. 4 is a schematic view of the seal of the present utility model at elevated temperatures;
in the figure: the valve comprises a 1-high-temperature sealing ring, a 2-low-temperature sealing ring, a 3-columnar central piece, a 4-cylindrical outer part, a 5-movable valve core assembly and a 6-return spring assembly.
Detailed Description
The present utility model will be further described with reference to the accompanying drawings, but the scope of the present utility model is not limited to the following.
As shown in fig. 2 to 4, an exemplary high-pressure sealing structure suitable for a wide temperature range includes a cylindrical center member, a cylindrical outer member, the cylindrical center member being housed in the cylindrical outer member; the cylindrical center piece and the cylindrical outer part are sealed by sleeving a high-temperature sealing ring 1 and a low-temperature sealing ring 2 on the cylindrical center piece; and the high-temperature sealing ring 1 and the low-temperature sealing ring 2 are contacted with each other.
In a low-temperature environment, the low-temperature sealing ring 2 has elasticity to seal, and the high-temperature sealing ring 1 loses elasticity to play a supporting role; under the high-temperature environment, the high-temperature sealing ring 1 has elasticity to seal, and the low-temperature sealing ring 2 becomes soft to play a role of filling. Specifically, referring to fig. 3 and 4: (1) when working in a low-temperature environment, the pressure firstly acts on the low-temperature sealing ring 2 with lower hardness near the pressure end, and the low-temperature sealing ring 2 is deformed by compression; at this time, the hardness of the sealing ring 1 with higher hardness is not suitable for sealing due to lower temperature, but the sealing ring 1 is not easy to deform, so that the sealing ring 2 deformed under pressure is well supported, the sealing ring 2 radially deforms, and the sealing ring 2 bears the sealing effect. (2) When the sealing device works in a high-temperature environment, pressure is firstly applied to the sealing ring 2 with lower hardness near the pressure end, and the sealing ring 2 becomes soft at high temperature, so that the sealing effect is poor; at this time, due to the fact that the temperature is high, the hardness of the sealing ring 1 with high hardness is reduced, the sealing ring 1 can be radially deformed to form a seal under the action of pressure, and the sealing ring 1 plays a role in sealing.
In addition, the cost of the sealing ring which is simply resistant to high temperature and low temperature is lower. The cost of the two sealing rings of the two-stage sealing structure is far lower than that of the sealing ring made of the special customized sealing material, but the sealing effect in the ultra-wide temperature range (-40-120 ℃) is better than that of the sealing ring made of the special customized sealing material.
In popular terms, the scheme provides a brand new two-stage sealing structure, wherein a sealing ring made of a low-temperature-resistant sealing material with lower hardness is adopted by a pressure end, and the sealing ring made of the high-temperature-resistant sealing material with higher hardness is closely attached to the rear surface of the sealing ring made of the low-hardness sealing material. Under the condition of low cost, the sealing ring of the high-temperature sealing material and the sealing ring of the low-temperature sealing material are combined in two stages to form a two-stage combined sealing structure, so that the sealing structure can have excellent sealing effect in high-temperature and low-temperature environments.
For example, the ultra wide range for which the present solution is applicable is-40 ℃ -120 ℃, and the high sealing pressure range is not higher than 70MPa. Further preferably, when the cylindrical center piece and the cylindrical outer part are sealed in a low-temperature environment, the lowest air temperature is not less than-40 ℃ and the highest fluid pressure is not more than 70MPa; when the cylindrical center piece and the cylindrical outer part are sealed in a high-temperature environment, the highest air temperature is not more than 120 ℃, and the highest fluid pressure is not more than 70MPa.
For example, in order to better realize the sealing of the scheme, the columnar center piece is provided with an annular groove, and the high-temperature sealing ring 1 and the low-temperature sealing ring 2 are sleeved in the annular groove. The structure is more suitable for the sealing mode of the scheme.
For example, referring to fig. 1, when the present solution is used in an H2 reducer solenoid valve: the high-temperature sealing ring 1 and the low-temperature sealing ring 2 are sleeved on the columnar center piece 3, and the columnar center piece 3 is arranged in the cylindrical outer part 4;
specifically, for example, the H2 pressure reducing solenoid valve includes a cylindrical outer member 4, a cylindrical center member 3, a movable valve element assembly 5, and a return spring assembly 6; the upper end of the cylindrical outer part 4 is provided with a cover body, and a columnar center piece 3, a return spring assembly 6 and a movable valve core assembly 5 are sequentially arranged in the cylindrical outer part from top to bottom; the movable valve core assembly 5 can slide in the cylindrical outer part 4, and a flexible layer at the lower part of the movable valve core assembly 5 seals the air outlet passage opening under the pressure of the return spring assembly 6; when the movable valve core assembly 5 slides upwards, the air inlet channel hole is communicated with the air outlet channel hole; when the movable valve core assembly 5 slides downwards, the air outlet channel hole is blocked; the cylindrical outer part 4 is externally wound with an enameled wire, the movable valve core assembly 5 and the columnar central part 3 are soft magnetic valve cores, and when the enameled wire is electrified, the movable valve core assembly 5 and the columnar central part 3 are magnetically conductive and attract each other, and the movable valve core assembly 5 slides upwards; the cylindrical outer part and the enameled wire are both positioned in the electromagnetic valve shell, and the electromagnetic valve shell is provided with an electrifying jack;
for example, when the scheme is used in a plunger type pressure reducer, the high-temperature sealing ring 1 and the low-temperature sealing ring 2 are both sleeved on a plunger, and the plunger is positioned in a plunger cavity of the pressure reducer body.
The foregoing examples represent only preferred embodiments, which are described in more detail and are not to be construed as limiting the scope of the utility model. It should be noted that variations and modifications can be made by those skilled in the art without departing from the spirit of the utility model, which falls within the scope of the utility model.
Claims (6)
1. The utility model provides a high pressure seal structure suitable for wide temperature range which characterized in that:
comprises a columnar central piece (3) and a cylindrical outer part (4), wherein the columnar central piece (3) is arranged in the cylindrical outer part (4);
the columnar center piece (3) and the cylindrical outer part (4) are sleeved with a high-temperature sealing ring (1) and a low-temperature sealing ring (2) for sealing; the high-temperature sealing ring (1) and the low-temperature sealing ring (2) are contacted with each other;
in a low-temperature environment, the low-temperature sealing ring (2) has elasticity to seal, and the high-temperature sealing ring (1) loses elasticity and becomes hard to play a supporting role; under the high-temperature environment, the high-temperature sealing ring (1) has elasticity to seal, and the low-temperature sealing ring (2) becomes soft to play a role in filling.
2. A high pressure seal suitable for a wide temperature range as set forth in claim 1, wherein: the columnar center piece (3) is provided with an annular groove, and the high-temperature sealing ring (1) and the low-temperature sealing ring (2) are sleeved in the annular groove.
3. A high pressure seal suitable for a wide temperature range as set forth in claim 1, wherein: when the columnar center piece (3) and the cylindrical outer part (4) are sealed in a low-temperature environment, the lowest air temperature is not less than-40 ℃, and the highest fluid pressure is not more than 70MPa;
when the cylindrical center piece (3) and the cylindrical outer part (4) are sealed in a high-temperature environment, the highest air temperature is not more than 120 ℃, and the highest fluid pressure is not more than 70MPa.
4. A high pressure seal suitable for a wide temperature range according to any one of claims 1 to 3, characterized in that: when the pressure reducer is used in a high-pressure electromagnetic valve of an H2 pressure reducer:
the high-temperature sealing ring (1) and the low-temperature sealing ring (2) are sleeved on the columnar center piece (3), and the columnar center piece (3) is arranged in the cylindrical outer part (4).
5. A high pressure seal suitable for a wide temperature range as claimed in claim 2, wherein: the high-pressure electromagnetic valve of the H2 pressure reducer comprises a cylindrical outer part (4), a cylindrical center piece (3), a movable valve core assembly (5) and a return spring assembly;
the upper end of the cylindrical outer part (4) is provided with a cover body, and a cylindrical center piece (3), a return spring assembly (6) and a movable valve core assembly (5) are sequentially arranged in the cylindrical outer part from top to bottom; the movable valve core assembly (5) can slide in the cylindrical outer part (4), and a flexible layer at the lower part of the movable valve core assembly (5) seals the air outlet passage opening under the pressure of the return spring assembly (6); when the movable valve core assembly (5) slides upwards, the air inlet channel hole is communicated with the air outlet channel hole; when the movable valve core assembly (5) slides downwards, the air outlet channel hole is blocked;
the enameled wire is wound outside the cylindrical outer part (4), the movable valve core assembly (5) and the columnar center piece (3) are soft magnetic valve cores, when the enameled wire is electrified, the movable valve core assembly (5) and the columnar center piece (3) are magnetically conductive and attract each other, and the movable valve core assembly (5) slides upwards;
the cylindrical outer part (4) and the enameled wire are both positioned in the electromagnetic valve housing, and the electromagnetic valve housing is provided with an electrifying jack.
6. A high pressure seal suitable for a wide temperature range according to any one of claims 1 to 3, characterized in that: when the plunger type pressure reducer is used in the plunger type pressure reducer, the high-temperature sealing ring (1) and the low-temperature sealing ring (2) are sleeved on the plunger, and the plunger is positioned in a plunger cavity of the pressure reducer body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321389306.1U CN220082264U (en) | 2023-06-02 | 2023-06-02 | High-pressure sealing structure suitable for wide temperature range |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321389306.1U CN220082264U (en) | 2023-06-02 | 2023-06-02 | High-pressure sealing structure suitable for wide temperature range |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220082264U true CN220082264U (en) | 2023-11-24 |
Family
ID=88832378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321389306.1U Active CN220082264U (en) | 2023-06-02 | 2023-06-02 | High-pressure sealing structure suitable for wide temperature range |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220082264U (en) |
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2023
- 2023-06-02 CN CN202321389306.1U patent/CN220082264U/en active Active
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